Pipe wrench



O. JOHNSON PIPE WRENCH Aug. 21, 192s. 1,681,641

Filed June 8, 1926 l Patented Aug. 21, 1928.

' UNITED Sterns,

OSCAR JOHNSON', 0F YORK, N. Y.

yPIPE' Wmnvon.y

Application filed June; 8,

Thisxinvention relates to improvements in pipey wrenches of the classdisclosed in the Ul S. Patent #1,104,730, issued to NV. J. llamblin,July 21,1914.; and has for its main object the provision oi a tool ofthis kind whichhas ai positive and instantaneous grip, great freedom ofrelease, and is adapted to be instantaneously reversed without taking itoil the pipe.`

Another object of the invention is to pro' vide a tool oi' this4 naturewith a locking notch which will prevent accidental loosening andseparation of the wrench from the pipe.

A. further object of the present invention is to provide a pipe wrenchhaving a dual locking .means whereby the wrench may be revolved in asubstantial arc and the chain not be disengaged from the tool or thepipe encircled by said chain.

A still'lfurther object of the present invention is to provide a pipewrench which is rapable ot rotating the pipe engaged by the pipegripping element in either direction without the necessity of removingthe wrench from its engagement with the pipe.

Another object of the present invention is to provide a pipe wrenchhaving a chain or the like forming the pipe gripping element providedwith means adapted to engage a double acting or double functioninglocking member whereby the wrench is capable of rotating the pipeengaged thereby in either direction Without removal of said wrench fromthe pipe.V v.

Other objects and novel features of construction will become apparent asthespeci cation proceeds. 1f 1n the accompanying drawings, forming apart of this specification, in which the varions reference numeralsrefer to the same parts in each of the views, p e

Fig. 1 is a longitudinal sectional view of the tool embodying my idea;

YFig. 2 is a view looking from the right oi Fig. 1;

Fig. 3 isa top plan view of the tool, lool@ ingdownupon Fig. 1; and

Fig. 4l is a ragmental view in detail, show ing the locking catch. Y n

Referring to the drawings in detail, 5 indicates a bifurcated headmember, having similar lateral walls 6 provided with inwardly projectingcombined catch and lockconnected to the chain 13 at 16.

1926.'. semi No. 114W ing .members orprojections that are-similar yinsize andzshape.- Thecatch members 'Z' are each` provided with an uppervertically' exrlrlre head vterminates :at-its lower-end in` azboss `orsleeved()adapted to receive therein ai, rod or handle 11. Phe generalcontour of the head is such as to allow for ready adjutment of the freeend 12 of a chain 13 in the catch members 7.V nected to the head 5bymeans of pins 14'passing through the walls 6 into link members 15 Pins17 f connect the links 18 of the chain and project beyond the chain asat 19.

In use, the chain is passed around a pipe 20, as clearly shown in Fig.1, and the 'free end of the chain is' passed between the walls 6 of thehead 5'. The extensions 19 ofone of thepins 17 are positioned in theslot 8 and the next lower extensions obviously are re# ceived inthenotch 9. Normally the extensions 19 are loosely positioned in thenotches 8 and 9, asclearly illustrated in Fig. 1; in other words thehandle 11 is capable of slight movement in either direction beforeeither of the extensions 19 is tightly engaged in the notches 8 or 9 asthe case may be. By moving the handle in either direction, that is,clockwise or counter-clockwise, it will be apparent that the chain willbe tightened against the pipe and the latter firmly gripped thereby.Should the handle be rotated clockwise, it will be obvious that theextensions 19 positioned within the slot 9 will tightly and firmlyengage within said slot` 9, and continued clockwise movement of thehandle will rotate the pipe in a clockwise mot-ion. Now, should it bedesired to rotate the pipe in a counter-clockwise motion to disengagethe same, thehandle is moved or rotated counterclockwise, whereupon theextensions 19 in slot 9 will become non-*functioning or', in otherwords, will loosely engage with said slot, and the'extensions 19 in slotSwill 'be iirmly en.-

`gaged, therein, and continued counter-clock' wise movement ot thehandle will rotate the vpipe correspondingly. The above-mentionedoperations are made possible becauselof the double locking means formedin the head of the Wrench together with the cooperating exv y' 'tensionson the pipe gripplngV element or vtending grooveor slotS and. alowernotch9 The chain 13 is pivotally conchain. By providing the doubleacting locky device may he made Withinr the scope of 'the ing means thisinvention contemplates, therefore7 a means for providing a plurality 'ofpivot points on the head of the Wrench Wherehywithout removing theWrench from. its engagement With the pipe, the lattermay be rota-ted ineither direction.. i

It is believed that the advantages of this invention Will be fullyapparent to those skilled in the art to which it appertains in view ofthe above description andthe drawings forming a. part of theapplication, and the particular features Vof novelty Willrbe pointed outin the appended claim. lI'desire it understood that the drawingsarefonillus-y trative purposes only, and that various changes in theform and proportions ofthe Achain secured at one end to said head, pinsprojectingfrom said chain, anda catch memkber on said head provided with'an upper locking slot to receive one of said pms When it 1s desired torevolve the pipe in one direction, and a ylower looking slot to receive4another of said pins When it is desired to revolve the pipe in theopposite direction.

OSCAR JoHNsoN.

